Gas cleaner



O. R. RICE GAS CLEANER Nov. l, 1938.

Filed June 22, 1936 4 Sheets-Sheet 2 Fig; 4#

l @wen Riace' BH Nov. 1, 1938.

Filed June 22, 1936 O. R. RICE GAS CLEANER 4 SheetsSheet 5 wen RRllcee ATTORNEY O. R. RICE GAS CLEANER Nov. 1, 1938.

Filed June 22, 1936 4 SheebS-Sheei 4 Zal/7 Gwen R. Rzlc Bv WMWVWMYW ATTORNEYl Patented Nov. 1, 1938 UNITED `sinrrzs GAS CLEANER Owen R. Rice, Chicago, Ill., assignor to Freyn Engineering Company, Chicago, Ill., a corporation of Maine Application June 22, 1936, Serial N0. 86,603

4 Claims.

The present invention relates to improvements in gas cleaning means.

More particularly the present invention relates to means for the removal of dust or the like from gas such as delivered by blast furnaces. Gas cleaning devices are in service and are giving good account of themselves which rely upon the effect of centrifugal force in removing the relatively heavy dust particles from the gas. Certain installations of the kind referred to involve structure having curvilinear passageways for the gas. The gas is wetted and, as a result, the walls deiining said curvilinear passageways are wetted and serve to collect dust particles which strike thereagainst during the passageof the gas through said passageways. Y

An object of the present invention is to provide gas cleaning means based fundamentally upon the principles of the installations above discussed in which maintenance problems are reduced to a minimum.

A further object is to provide gas cleaning means which is simple in construction and opera-- tion and which may be repaired without putting said gas cleaning means completely out of operation.

A further object is to provide. gas cleaning means operating upon the principle of centrifugal force which is well adaptedV to meet the needs of commercial operation.

Further objects will appear as the description proceeds.

Referring to the drawings- Figure l is a top plan view of one embodiment of the present invention;

Figure 2 is a View in end elevation of. the construction shown in Figure 1;

Figures 3 and 4 are plan and end elevational views, respectively, showing a modication of the structure shown in Figures 1 and 2;

Figure 5 is a View in side elevation of the structure shown in Figure 3;

Figure 6 is a sectional View, the top being removed, of a portion of the structure shown in Figure 3;

Figure '7 is a sectional View taken along the plane indicated by the arrows 'l-l of Figure 6;

Figure 8 is a view showing how an` assemblage of vanes may be loweredinto a structure for receiving said assemblage-of vanes; and

Figure 9 is a view on an enlarged scaleV of a detail of construction.

Referring first to Figures 1 and 2, these figures show a construction in which dirty gas is conducted through the main I@ to an elbow I I. Disposed in position to spray water into the dirty gas from the main I is the spraying device I 2'. The dirty gas charged with water from the spraying device I2 is carried through the down pipe I3 to the pipe I4. Said pipe I4 has aligned therewith the gas main I5, and communication between the pipe I4 and the gas main I5 is controlled by the valve I6. symmetrically disposed With respect to the axis of the gas main I6 are the two curvilinear conduits I'I and I8, eachv of which is U-shaped in general contour and eachY of which provides a by-pass around the valve I6 from the pipe I3 to the gas main I5. Each of the conduits l1 and I8 is provided with the pair of valves I9-I9 located adjacent to the extremities of the corresponding conduit Il or I8. Said valves IB and I9I9 have the function of controlling the passage of gas through the gas main I5, the curvilinear conduit Il and/or the curvilinear conduit I8.

The down pipe I3 mayv extend below the level of the gas main I and the curvilinear conduits Il and I8 to provide a receptacle 2! for dirty water which may be drawn off through the trap 2|, said trap serving to prevent the escape of gas therethrough.

The construction shown in Figures 3, 4 and 5 will be clear without detailed explanation. In said guresthe dirty gas pipe lila is disposed in alignment with the gas main I5, and communication therebetween is controlled by the valve I6. Communication between the dirty gas pipe Illa and the gas main I5 around the valve I5 is provided by the two curvilinear conduits Ila and Ia, each of which is controlled by a pair of valves I-Sa--ISa disposed adjacent to the extremities thereof. A spraying device I 2a is provided for spraying water into the dirty gas within the dirty gas pipe Ia. Said dirty gas pipe Illa may be provided with the drain 22 for drawing ofi dirty water. Said pipe ma may be provided with the wash-out plug 23, whereby a stream of water may be directed into the dirty gas pipe I Ila. to wash out accumulations of mud which may collect therein.

Figures 6, 7, 8 and 9 illustrate a preferred vane assembly which may be used in connection with the curvilinear conduit I 1a or the curvilinear conduit Ia. As the description proceeds it will be clear that the construction shown in Figures 6 to 9 inclusive may be used in the curvilinear conduits I-'l and I8 of Figures land 2.

The particular curvilinear conduit chosen for illustration in Figures 6 to 9 is the conduit 18a of Figures 3, 4 and 5. This conduit includes a casing 24 comprising half of an annulus, the cross-sectional contour of said casing 24 being U-shaped. Disposed at the upper extremities of the inner and outer walls of the casing 24 are angles 25-25' for the reception of a cover 215,` which may be bolted to said flanges 25-25 to provide a gas-tight receptacle.`

Disposed within the casing 241 are a pair of vane assembli-es indicated in Figure 8 by the numeral 26. Each of said assemblies 26 comprises a plurality of Vvaries 21--21 curved about the axis of the annular conduit |80.. Each of said vanes -21-21 has a curvilinear extent of approximately 90 degrees. l Said vanes are held in rigid spaced relationship with one another by means of the support bridges 28-28 at the bottoms of said varies 21-21 and by the bridges 29--29 located at the tops of said varies.V upper edges of the vanes 27-21 are provided with angles 30-30'adapted to be secured to the bridges 29-29. Said bridges 29--29 have extending end portions adapted to rest upon and to be pinned to clips 3l-3l secured to the opposite side walls of the U-shaped casing v24.V -As shown, the lower extremities of the vanes 21-2'! are provided with lugs 32-32 having threaded extremities adapted to be secured to the supporting bridges 28-28. The supporting bridges 28-28 have downwardly extending feet 33-33 which are useful in assembling the vanes before mounting in the casing. Disposed adjacent to the bottom of the casing 24 are a plurality of spray nozzles 34-34 for directing streams of water along said bottom wall. Preferably, said streams of water should be' directed oppositely to the gas flow. Water from the nozzles 34-34 will wash deposit which has collected in the bottom of the casing 24 toward the drain 22.

The surfaces of the vanes 2'1-21 and the inside surfaces rof the walls of the curvilinear conduits l1, I8, Ila.' and Illa will preferably be covered with rubber or its equivalent. Rubber or the likehas the very advantageous quality of causing water to spread readily thereupon,presenting a surface very well adapted to catchdust partiinserted in place in their curvilinear conduits,

or may be readily removed for repairs or replacement.

Under normal operation water will be sprayed into the dirty gas entering the device from the pipev I0 (Figs. 1 and 2) or the pipe ia. (Figs. 3, 4 and Y5). Under such'no'rmal operation the valve I6 will be in closed position and the valves lll-I9 (Figs. 1 and 2) or the valves ISa--Iga (Figs. 3, 4 and 5).Will be open. Under-these conditions the .wetted dirty gas will be directed through the curvilinear'conduits I'l-,IS (Figs. l Y

and 2) or llc-Illa (Figs. 3,4 and 5) The curvilinear vanes 2'1-21, together with the curvilinear inside surfaces of the conduits I'l--l or lla-wa, will cause the gases to take up a curvilinear course of movement from the incoming The dust particles, beingv relatively heavy,v will tend to travel in straight lines, whereby they will impinge upon the water-coated rubber surfaces of said conduits or vanesnk There will also be a continual deposition of water particles upon said rubbercoated surfaceswhereby said' surfaces will becontinually wetted. The dirt collected from the -gaswill flow down the vertical surfaces to theV bottoms of the curvilinear conduitsAlI-l8 (Figs. 1 and 2) or the curvilinear conduits Ila-la (Figs. 3, 4 and 5) and will tend to collect along the'bottom walls of said curvilinear conduits.

VSaid dirt will be flushed out Vby the water from the spray nozzles 34--34 and will be discharged through the trap 2| (Figs. 1` and 2) or the drain 22 (Figs. 3, 4 and 5).

Though certain preferred embodiments of the present invention have been described in detail, many modifications will occur to those skilled in the art. It is intended to cover all such modifications that fall within the scope of the appended What is claimed is- 1. In gas cleaning means, in combination, a curved conduit and an assembly of vanes within said conduit, said vanes being spaced apart and disposed vertically and conforming to the curvature of said conduit, bridging means for holding said vanes in assembled relationship with each other, supporting means on the interior of said conduit cooperating with certain of said bridging means to suspend said assembly of vanes in spaced relationship with the bottom of said conduit, and a'plurality of flushing means spaced circumferentially ofl said conduit adjacent to the bottom thereof for squirting water along said bottom.

2. In gas cleaning means, in combination, a curved conduit and a plurality of assemblies of vertically disposed vanes within said conduit, the vanes of one of said assemblies being disposed relative to the vanes of the others of said assemblies for providing smooth curved passageways through said assemblies, each of said assemblies being provided with bridging means for holding the vanes thereof in assembled relationship with each o-ther, supporting means on the interior ofV said-conduit co-operating with certain of said bridging means, said supporting means being disposed in position to hold said assemblies above the bottom of said co.nduitand a plurality of flushing means disposed circumferentially of said conduit adjacent to the bottom ture of said conduit to provide a plurality of passageways through said conduit, bridgingV means for holding said vanes in assembled relationship with each other, Supporting means for said bridging means readily accessible'at the top of said conduit, and a plurality of flushing means disposed circumferentially of said con-Y duit adjacent to the bottom thereof for squirting water along said'bottom.

' 4. In gas cleaning means, in combination, a

curved conduit and an assembly of vanes within said conduit, said vanes being spaced apart and disposed vertically and conforming to the curvature of said conduit, said varies being provided l at their tops individually with angle membersV extending circumferentially for substantiallyA the entire length of said vanes, said angle members serving to preserve the radius of curvature of their respective vanes and also constituting means for suspending said vanes from above,

V`bridging means secured to said angle members for holding said varies in assembled relationship Vwith each other, supporting means on the interior of said conduit cooperating with certain of said bridging means to suspend said assembly of varies in spaced relationship with the bottom of said conduit, and means for directing flushing water along the bottom of said conduit.

OWEN R. RICE. 

